title: Optical transition probabilities in Er3+- and Tm3+-doped LiLa9(SiO4)6O2 crystals.
abstract: In this work, Er(3+) and Tm(3+)-doped LiLa(9)(SiO(4))(6)O(2) crystals have been grown from an Li(2)MoO(4) flux in the 1360-940 °C temperature range. Optical absorption spectra have been measured to obtain the experimental oscillator strengths of the transitions from the ground state to the excited levels. Judd-Ofelt calculations have been performed to estimate the Ω(2), Ω(4) and Ω(6) intensity parameters. The dynamics of selected Er(3+) and Tm(3+) manifolds have been investigated under selective pulsed excitation in order to determine the energy gap law by comparing the observed decay rates with the Judd-Ofelt predictions.
authors.affiliation: Departamento Física de Materiales (Módulo 04), Universidad Autónoma de Madrid, E-28049 Madrid, Spain. eugenio.cantelar@uam.es
authors.forename: E
authors.initials: E
authors.lastname: Cantelar
authors.forename: M
authors.initials: M
authors.lastname: Quintanilla
authors.forename: F
authors.initials: F
authors.lastname: Cussó
authors.forename: E
authors.initials: E
authors.lastname: Cavalli
authors.forename: M
authors.initials: M
authors.lastname: Bettinelli